Vitamin B12: Is a common allergen and is know to cause Cardiovascular disease like heart disease.

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Image url:http://www.3dchem.com/imagesofmolecules/vitaminb12.gif
information url:http://www.mayoclinic.com/health/vitamin-B12/NS_patient-vitaminb12#31C3B205-E7FF-0DBD-1B00DE0873013949